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English definition of “vertex”

vertex

noun [C] uk   /ˈvɜː.teks/ us    /ˈvɝː.t̬eks/ (plural vertices or vertexes) specialized
(in mathematics) the point where two lines meet to form an angle, or the point that is opposite the base of a shape: the vertex of a triangle/cone/pyramid the highest point of something
(Definition of vertex from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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